package task07;

import java.util.Scanner;

/**
 * @author Administrator
 */
public class Tesk4 {
    public static void main(String[] args) {
        System.out.println("请输入一个数：");
        Scanner scanner = new Scanner(System.in);
        int x = scanner.nextInt();
        switch (x/10){
            case 10:
            case 9:
              System.out.println("优秀");
              break;
            case 8:
              System.out.println("良好");
              break;
            default:
              System.out.print("还需努力");
              break;
        }
    }
}
